2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 6: Yagi Intl. Symp. / Metals & Alloys Processing
| Editors: | Kongoli F, Akiyama T, Nogami H, Saito K, Fujibayashi A |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 480 pages |
| ISBN: | 978-1-987820-46-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Experimental Research on Vanadium Extraction with CO2 and O2 Mixed Blowing
Wei-Tong Du1; Peng-Cheng Li1; Xiaoping Liang2; Yu Wang1;1CHONGQING UNIVERSITY, Chongqing, China; 2, Chongqing, China;
Type of Paper: Regular
Id Paper: 20
Topic: 3
Abstract:
Carbon dioxide, a major component of metallurgical waste gas, could be comprehensively utilized to replace part of oxygen in vanadium-extraction converter. The thermodynamic theory and lab-scale experimental research on high efficiency vanadium-extraction in CO2 and O2 mixed blowing process have been undertaken. The results show that the oxidation of silicon and vanadium is rapid at the initial stage of CO2 and O2 mixed blowing process (0~6min), and the bath temperature rises quickly at speed of 10 K/min, then the bath temperature becomes gradually increased at speed of 2 K/min (6~15min) and decreases 7 K as CO2 blowing rate increases 10%. We found that when the proportions of CO2 from 10% to 15% in the mixed gas, the end point temperature of the bath can be controlled at below 1630 K, which is below the converting temperature for selective oxidation of vanadium and carbon. Meanwhile, the carbon oxidation rate and oxygen consumption of 15% CO2 blowing process are 12% and 8.5% less than pure O2 blowing process respectively. These findings suggest that introducing the technology of 15% CO2- 85% O2 mixed blowing could promote the extraction of vanadium, and keep carbon in semi-steel effectively.
Keywords:
CO2; Extraction; Oxidation; Temperature;References:
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